Walker began to pull at the dark mana. Not from the air around him, but only using the eternal codex to take dark mana from the formation. He could sense the gathering quantity within the formation and understood that the formation would always be pulling in more and more dark mana. However, the rate that it drew it in was consistent as long as nothing unusual happened.
There were times it might change based on the time of day, however, that would easily be adjusted. It was the mana that got circulated over and over without dissipating properly that caused extra stress. The mana that gathered in the materials that the rune formations were carved on and the mana that gathered and stopped filtering through properly.
